Question

The correct match between Item- 1 and Item-2 is:

• A. (a) - (III), (b) - (IV), (c) - (I), (d) - (II)
• B. (a) - (IV), (b) - (III), (c) - (II), (d) - (I)
• C. (a) -(IV), (b) - (III), (c) - (I), (d) - (II)
• D. (a) - (III), (b) - (IV), (c) - (II), (d) - (I)

Answer 1

The correct option is B

(a) - (IV), (b) - (III), (c) - (II), (d) - (I)

(a) Natural rubber - (IV) Isoprene

1. Natural rubber is basically a polyisoprene which consists if the monomer units that are of isoprene that means $2-\mathrm{methyl}-1,3\mathrm{butadiene}$.
2. It is actually obtained in the form of the solid particles.
3. And it is suspended in the milky white liquid which is further known as latex

(b) Neoprene - (III) Chloroprene

1. Chloroprene is actually a synthetic rubber which is also known as the trade name that is Neoprene.
2. Neoprene is also known as polychloroprene or the chloroprene rubber that is the synthetic rubber and is actually produced by the polymerization pf the single molecules of the chloroprene.

(c) Buna-N - (II) 1,3-butadiene + acrylonitrile

1. Actually the preparation of Buna-N is done by the co-polymerization of 1,3-butadiene and acrylonitrile together.
2. This is actually done in the presence of peroxide catalyst.

(d) Buna-S - (I) 1,3-butadiene + styrene

1. Buna-S is actually a co polymer of the 1,3-butadiene and styrene all together in the ratio $1:3$.
2. And this is actually prepared by the copolymerization reaction of 1,3-butadiene and styrene under or along with the Sodium or peroxide and also in the presence of heat.

Therefore,

Item -1	Item -2
Natural rubber	Isoprene
Neoprene	Chloroprene
Buna- N	1,3 butadiene + acrylonitrile
Buna- S	1,3 butadiene + styrene